Alphawerks/Nexus Headers Dyno
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From: Valdosta, GA
Alphawerks/Nexus Headers Dyno
Originally Posted by Armitage
Taken from G35Driver.com:
BTW, he's on 20's. So there is definitely more power to be had with say, oh, 18" Track rims. 
I think this is a pretty fair argument for the ability of these headers. The person did a pretty good job of trying to keep the invididual runs as close as possible to the same conditions.
Originally Posted by coupeondubs
I just did an install on a set of Alphawerks headers on my G35...before I go into the driving let me just give you the numbers...average is all three alphawerks pulls averaged, less the average of the baseline pulls...the best is taken by comparing my best alphawerks dynos and my worst before dyno and the worst gains are done by comparing vise-versa...the average is the only real world number I believe that anyone should go by...
DYNO NUMBERS
---------------------------------------------------
Average WHP gain: 17.64 whp
Average TORQUE gain: 16.40 lbs/tq
STATS ON MY CAR AND DYNO
----------------------------------------------------------
Automatic G35 w/ 20" Maya Multi-Piece wheels lowered w/ Tein Springs
Dynojet Dyno
89 degrees average temp for all runs
Humidity 24%
All runs at same engine coolant temp.
No fans allowed in front of the car.
Three baselines...install...then 3 pulls with headers (actually 4 pulls but one came out with an error)
SAE Corrected
Basically I wanted to make sure I was getting what I was supposed to for the money I paid for the headers. I wanted to make sure that there was no fan to force air in front and no playing with the engine temperatures so we made sure the car was run at the same engine coolant temperatures and all this done in one day to make sure the environmental factors were all constants.
As for the ride, first there is no check engine light problem and I have driven the car about 500 miles...the car feels like it keeps pulling alot more once it hits 5000 rpm. I felt a difference in the entire powerband, but that is were it was really noticable, especially at high speeds. It basically pulls at 80mph like it would pull at 65 before I put in the headers. As for the noise, the headers sound alot like stock since I have a stock exhaust. I guess that when you really hit some high revs you can hear a very small difference, but it is definitely slight. Next up are going to be the Alphawerks test-pipes hopefully sometime this month and I will post dynos again...
Hope this illuminates on these headers. If anyone has any questions just let me know, and thanks to all the guys at Nexus Industry: Victor, Anthony, and Carlos especially...who were helpful especially after I tried to to the install myself and failed...
MY BASELINE DYNOS 1+2+3
------------------------------------------------------
ALPHWERKS HEADER DYNO RUNS 4+5+6:
----------------------------------------------------------
DYNO NUMBERS
---------------------------------------------------
Average WHP gain: 17.64 whp
Average TORQUE gain: 16.40 lbs/tq
STATS ON MY CAR AND DYNO
----------------------------------------------------------
Automatic G35 w/ 20" Maya Multi-Piece wheels lowered w/ Tein Springs
Dynojet Dyno
89 degrees average temp for all runs
Humidity 24%
All runs at same engine coolant temp.
No fans allowed in front of the car.
Three baselines...install...then 3 pulls with headers (actually 4 pulls but one came out with an error)
SAE Corrected
Basically I wanted to make sure I was getting what I was supposed to for the money I paid for the headers. I wanted to make sure that there was no fan to force air in front and no playing with the engine temperatures so we made sure the car was run at the same engine coolant temperatures and all this done in one day to make sure the environmental factors were all constants.
As for the ride, first there is no check engine light problem and I have driven the car about 500 miles...the car feels like it keeps pulling alot more once it hits 5000 rpm. I felt a difference in the entire powerband, but that is were it was really noticable, especially at high speeds. It basically pulls at 80mph like it would pull at 65 before I put in the headers. As for the noise, the headers sound alot like stock since I have a stock exhaust. I guess that when you really hit some high revs you can hear a very small difference, but it is definitely slight. Next up are going to be the Alphawerks test-pipes hopefully sometime this month and I will post dynos again...
Hope this illuminates on these headers. If anyone has any questions just let me know, and thanks to all the guys at Nexus Industry: Victor, Anthony, and Carlos especially...who were helpful especially after I tried to to the install myself and failed...
MY BASELINE DYNOS 1+2+3
------------------------------------------------------
ALPHWERKS HEADER DYNO RUNS 4+5+6:
----------------------------------------------------------
I think this is a pretty fair argument for the ability of these headers. The person did a pretty good job of trying to keep the invididual runs as close as possible to the same conditions.
Originally Posted by Glude
Awsome Numbers! I assume the 20" wheels are to blame for the low baseline numbers. You should put the stockers on there for the next dyno runs if you still have them. Just an idea 
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Joined: Oct 2004
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From: Walnut, CA / Doral, FL
Originally Posted by titanjc
Awesome!
I wonder what gains these headers would bring to a VQ w/ cats/exhuast?
I wonder what gains these headers would bring to a VQ w/ cats/exhuast?
Runs are back to back...much easier install...the numbers are very good but I would assume that on a bad day you are still looking at 10-12 whp
http://www.nexusindustry.com/dyno/350z_testpipes.htm
Enjoy...
Victor D.
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From: Canada B.C.
Originally Posted by Nexusindustry
If you are curious about the taking out the cats...I know that there is very little footage or sound clips or dynos on test pipes...but here are some dyno numbers that we found and the sound clips on this page...
Runs are back to back...much easier install...the numbers are very good but I would assume that on a bad day you are still looking at 10-12 whp
http://www.nexusindustry.com/dyno/350z_testpipes.htm
Enjoy...
Victor D.
Runs are back to back...much easier install...the numbers are very good but I would assume that on a bad day you are still looking at 10-12 whp
http://www.nexusindustry.com/dyno/350z_testpipes.htm
Enjoy...
Victor D.
Didn't their test pipes dyno at around +10/11 whp for just the cats alone? So with the two combined (test pipes and header), you may be looking at +25-30 whp for around $1.1k + installation.
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Joined: Oct 2004
Posts: 140
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From: Walnut, CA / Doral, FL
Originally Posted by Armitage
Didn't their test pipes dyno at around +10/11 whp for just the cats alone? So with the two combined (test pipes and header), you may be looking at +25-30 whp for around $1.1k + installation.
To all those doing dyno's if you do the dyno's on different days, then they if you want to be strict dont count. I have seen some members here doing baseline dynos and then installing like the next day and then doing the dyno on another day. This of course introduces variables such as temperature, humidity, atmosph. pressure, etc.
As for price, I know that Avalon Racing has the products for less than the $1.1k.
Also remember that once a shop does the headers they might as well throw in the test pipes as well and you can probably get both done for the same install price.
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Joined: Dec 2002
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From: Canada B.C.
Originally Posted by Nexusindustry
For the combo package between the headers and test pipes I would post a more conservative figure between 16-20whp. I prefer to give the conservative numbers of 14whp for the headers because that is the lowest that I have seen them dyno'd, when they have been dyno'd correctly.
but nice gain anyways
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